Just been reading my handbook for the CL. Under the heading 'Engine' it lists the following.
CL600 500BHP Torque 800nm at 1800RPM to 3500RPM...............
CL55AMG 500BHP Torque 700 at 2750RPM to 4000RPM................
Now the 0.60mph is the same for both cars at 4.8sec and...